Next Article in Journal
Research on Operation Efficiency and Membrane Fouling of A2/O-MBR in Reclaimed Water Treatment
Next Article in Special Issue
Systematic Study of the Impact of Pulsed Electric Field Parameters (Pulse/Pause Duration and Frequency) on ED Performances during Acid Whey Treatment
Previous Article in Journal / Special Issue
Concentration Dependencies of Diffusion Permeability of Anion-Exchange Membranes in Sodium Hydrogen Carbonate, Monosodium Phosphate, and Potassium Hydrogen Tartrate Solutions
Open AccessArticle

Neutralization Dialysis for Phenylalanine and Mineral Salt Separation. Simple Theory and Experiment

1
Department of Physical Chemistry, Kuban State University, 149 Stavropolskaya Street., 350040 Krasnodar, Russia
2
Department of Analytical Chemistry, Voronezh State University, 1 Universitetskaya pl., 394018 Voronezh, Russia
*
Author to whom correspondence should be addressed.
Membranes 2019, 9(12), 171; https://doi.org/10.3390/membranes9120171
Received: 28 November 2019 / Revised: 7 December 2019 / Accepted: 10 December 2019 / Published: 10 December 2019
(This article belongs to the Special Issue Ion-Exchange Membranes and Processes)
A simple non-steady state mathematical model is proposed for the process of purification of an amino acid solution from mineral salts by the method of neutralization dialysis (ND), carried out in a circulating hydrodynamic mode. The model takes into account the characteristics of membranes (thickness, exchange capacity and electric conductivity) and solution (concentration and components nature) as well as the solution flow rate in dialyzer compartments. In contrast to the known models, the new model considers a local change in the ion concentration in membranes and the adjacent diffusion layers. In addition, the model takes into consideration the ability of the amino acid to enter the protonation/deprotonation reactions. A comparison of the results of simulations with experimental data allows us to conclude that the model adequately describes the ND of a strong electrolyte (NaCl) and amino acid (phenylalanine) mixture solutions in the case where the diffusion ability of amino acids in membranes is much less, than mineral salts. An example shows the application of the model to predict the fluxes of salt ions through ion exchange membranes as well as pH of the desalination solution at a higher than in experiments flow rate of solutions in ND dialyzer compartments. View Full-Text
Keywords: neutralization dialysis; simulation; experiment; amino acid; mineral salt neutralization dialysis; simulation; experiment; amino acid; mineral salt
Show Figures

Figure 1

MDPI and ACS Style

Kozmai, A.; Goleva, E.; Vasil’eva, V.; Nikonenko, V.; Pismenskaya, N. Neutralization Dialysis for Phenylalanine and Mineral Salt Separation. Simple Theory and Experiment. Membranes 2019, 9, 171.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop